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| 1 | On-chip programmable pulse processor employing cascaded MZI-MRR structure显示文摘Optical pulse processor meets the urgent demand for high-speed,ultra wideband devices,which can avoid electrical confinements in various fields,e.g.,alloptical communication,optical computing technology,cohcrcnt control and microwave fields.To date,great efforts have been madc particularly in on-chip programmable pulse proccessing.Here,we experimentally demonstrate a programmable pulse proceesor employing 16cascaded Mach-Zehnder interferometer coupled microring resonator(MZI-MRR)structure based on silicon-oninsulator wafer.With micro-heaters loaded to the device,both amplitude and frequency tunings can be realized in each MZI-MRR unit.Thanks to its reconfigurability and integration ability,First,it can serve as a fractional differentiator whose tuning range is 0.51-2.23 with deviation no more than 7%.Second,the device can be tuned into a programmable optical filter whose bandwidth varies from 0.15to 0.97nm.The optical filter is also shape tunable.Especially,15-channel wavelength selective switches are generated. | Yuhe ZHAO Xu WANG Dingshan GAO Jianji DONG Xinliang ZHANG | 2019 | Frontiers of Optoelectronics2019，12，2： | 9 |
| 2 | Performance of integrated optical switches based on 2D materials and beyond显示文摘Applications of optical switches,such as signal routing and data-intensive computing,are critical in optical interconnects and optical computing.Integrated optical switches enabled by two-dimensional(2D)materials and beyond,such as graphene and black phosphorus,have demonstrated many advantages in terms of speed and energy consumption compared to their conventional silicon-based counterparts.Here we review the state-of-the-art of optical switches enabled by 2D materials and beyond and organize them into several tables.The performance tables and future projections show the frontiers of optical switches fabricated from 2D materials and beyond,providing researchers with an overview of this field and enabling them to identify existing challenges and predict promising research directions. | Yuhan YAO Zhao CHENG Jianji DONG Xinliang ZHANG | 2020 | Frontiers of Optoelectronics2020，13，2： | 8 |
| 3 | A review:Photonics devices,architectures,and algorithms for optical neural computing显示文摘The explosive growth of data and information has motivated various emerging non-von Neumann computational approaches in the More-than-Moore era.Photonics neuromorphic computing has attracted lots of attention due to the fascinating advantages such as high speed,wide bandwidth,and massive parallelism.Here,we offer a review on the optical neural computing in our research groups at the device and system levels.The photonics neuron and photonics synapse plasticity are presented.In addition,we introduce several optical neural computing architectures and algorithms including photonic spiking neural network,photonic convolutional neural network,photonic matrix computation,photonic reservoir computing,and photonic reinforcement learning.Finally,we summarize the major challenges faced by photonic neuromorphic computing,and propose promising solutions and perspectives. | Shuiying Xiang Yanan Han Ziwei Song Xingxing Guo Yahui Zhang Zhenxing Ren Suhong Wang Yuanting Ma Weiwen Zou Bowen Ma Shaofu Xu Jianji Dong Hailong Zhou Quansheng Ren Tao Deng Yan Liu Genquan Han Yue Hao | 2021 | Journal of Semiconductors2021，42，2： | 7 |
| 4 | Photonic matrix multiplication lights up photonicaccelerator and beyond显示文摘Matrix computation,as a fundamental building block of information processing in science and technology,contributes most of the computational overheads in modern signal processing and artificial intelligence algorithms.Photonic accelerators are designed to accelerate specific categories of computing in the optical domain,especially matrix multiplication,to address the growing demand for computing resources and capacity.Photonic matrix multiplication has much potential to expand the domain of telecommunication,and artificial intelligence benefiting from its superior performance.Recent research in photonic matrix multiplication has flourished and may provide opportunities to develop applications that are unachievable at present by conventional electronic processors.In this review,we first introduce the methods of photonic matrix multiplication,mainly including the plane light conversion method,Mach–Zehnder interferometer method and wavelength division multiplexing method.We also summarize the developmental milestones of photonic matrix multiplication and the related applications.Then,we review their detailed advances in applications to optical signal processing and artificial neural networks in recent years.Finally,we comment on the challenges and perspectives of photonic matrix multiplication and photonic acceleration. | Hailong Zhou Jianji Dong Junwei Cheng Wenchan Dong Chaoran Huang Yichen Shen Qiming Zhang Min Gu Chao Qian Hongsheng Chen Zhichao Ruan Xinliang Zhang | 2022 | Light(Science & Applications)2022，11，2： | 4 |
| 5 | Tunable optical delay line based on integrated grating-assisted contradirectional couplers显示文摘Tunable optical delay lines are one of the key building blocks in optical communication and microwave systems.In this work, tunable optical delay lines based on integrated grating-assisted contradirectional couplers are proposed and experimentally demonstrated. The device performance is comprehensively improved in terms of parameter optimization, apodization analysis, and electrode design. Tunable group delay lines of 50 ps at different wavelengths within the bandwidth of 12 nm are realized with a grating length of 1.8 mm. Under thermal tuning mode, the actual delay tuning range is around 20 ps at 7.2 V voltage. At last, a new scheme adopting an ultra-compact reflector for doubling group delay is proposed and verified, achieving a large group delay line of 400 ps and a large dispersion value up to 5.5 × 10~6 ps∕(nm · km) within bandwidth of 12 nm. Under thermal tuning mode, the actual delay tuning range is around 100 ps at 8 V voltage. | XU WANG YUHE ZHAO YUNHONG DING SANSHUI XIAO JIANJI DONG | 2018 | Photonics Research2018，6，9： | 4 |
| 6 | Survival difference between EGFR Del19 and L858R mutant advanced non-small cell lung cancer patients receiving gefitinib:a propensity score matching analysis显示文摘Objective: Although superior clinical benefits of epidermal growth factor receptor(EGFR) tyrosine kinase inhibitors(TKIs) in the treatment of advanced non-small-cell lung cancer(NSCLC) had been reported,the survival difference between exon 19 deletion(Del19) and exon 21 Leu858 Arg substitution(L858 R) remains controversial.The purpose of this study is to investigate the differences in progression-free survival(PFS) and overall survival(OS) between different EGFR mutant subtypes among advanced NSCLC patients receiving gefitinib.Methods: There were 204 advanced NSCLC patients with EGFR mutations treated with gefitinib were enrolled in this retrospective cohort study.Patients were divided into the EGFR Del19 group and the L858 R mutated group according to their mutant subtype.Propensity score matching(PSM) was conducted by using a nearest-neighbor algorithm(1:1) to adjust for demographical and clinical covariates.Survival curves were constructed with the Kaplan-Meier method and compared by using the log-rank test.Results: The PFS in Del19 group was similar to that in the L858 R group [before PSM 8.6 vs.7.2 months,P=0.072; after PSM 7.3 vs.7.2 months,P=0.155].No differences were detected in OS between the L858 R and the Del19 group(before PSM 17.8 vs.13.1 months,P=0.253; after PSM 16.9 vs.13.1 months,P=0.339).The Del19 group was significantly younger compared with the L858 R mutation group in age(P=0.015).Conclusions: No significant difference was found in the PFS or OS between the Del19 and L858 R mutant NSCLC patients receiving gefitinib.The age gap might contribute to the survival differences between Del19 and L858 R groups.PSM is of important value to the elimination of potential bias. | Minglei Zhuo Qiwen Zheng Jun Zhao Meina Wu Tongtong An Yuyan Wang Jianjie Li Shuhang Wang Jia Zhong Xue Yang Hanxiao Chen Bo Jia Zhi Dong Emei Gao JingjingWang Ziping Wang | 2017 | Chinese Journal of Cancer Research2017，29，6： | 4 |
| 7 | Wideband adaptive microwave frequency identification using an integrated silicon photonic scanning filter显示文摘Photonic-assisted microwave frequency identification with distinct features, including wide frequency coverage and fast tunability, has been conceived as a key technique for applications such as cognitive radio and dynamic spectrum access. The implementations based on compact integrated photonic chips have exhibited distinct advantages in footprint miniaturization, light weight, and low power consumption, in stark contrast with discrete optical-fiber-based realization. However, reported chip-based instantaneous frequency measurements can only operate at a single-tone input, which stringently limits their practical applications that require wideband identification capability in modern RF and microwave applications. In this article, we demonstrate, for the first time, a wideband, adaptive microwave frequency identification solution based on a silicon photonic integrated chip,enabling the identification of different types of microwave signals from 1 to 30 GHz, including single-frequency,multiple-frequency, chirped-frequency, and frequency-hopping microwave signals, and even their combinations.The key component is a high Q-factor scanning filter based on a silicon microring resonator, which is used to implement frequency-to-time mapping. This demonstration opens the door to a monolithic silicon platform that makes possible a wideband, adaptive, and high-speed signal identification subsystem with a high resolution and a low size, weight, and power(SWaP) for mobile and avionic applications. | XU WANG FENG ZHOU DINGSHAN GAO YANXIAN WEI XI XIAO SHAOHUA YU JIANJI DONG XINLIANG ZHANG | 2019 | Photonics Research2019，7，2： | 3 |
| 8 | Compact and broadband multimode waveguide bend by shape-optimizing with transformation optics显示文摘Multimode waveguide bend is one of the key components for realizing high-density mode-division multiplexing systems on chip.However,the reported multimode waveguide bends are either large,bandwidth-limited or fabrication-complicated,which hinders their applications in future high-density multimode photonic circuits.Here we propose a compact multimode waveguide bend supporting four TE modes simply by shape-optimizing with transformation optics.The shape of the waveguide is optimized in the virtual space with gradient distribution of the refractive index,so that the scattering loss and intermode cross talk are well suppressed.After conformal mapping back into the physical space,a compact(effective radius of 17μm)multimode bending waveguide is obtained.Simulations show that the proposed multimode waveguide bend has little loss(<0.1 dB)and low cross talk(<−20 dB)throughout an ultrabroad wavelength range of 1.16–1.66μm.We also fabricated the shape-optimized multimode bending waveguide on a silicon-on-insulator wafer.At 1550 nm wavelength,the measured excess losses for the four lowest-order TE modes are less than 0.6 dB,and the intermode cross talks are all below−17 dB.Our study paves the way for realizing high-density and large-scale multimode integrated optical circuits for optical interconnect. | SHUYI LI LIFENG CAI DINGSHAN GAO JIANJI DONG JIN HOU CHUNYONG YANG SHAOPING CHEN XINLIANG ZHANG | 2020 | Photonics Research2020，8，12： | 3 |
| 9 | Broadband on-chip integrator based on silicon photonic phase-shifted Bragg grating显示文摘All-optical integrators are key devices for the realization of ultra-fast passive photonic networks, and, despite their broad applicability range(e.g., photonic bit counting, optical memory units, analogue computing, etc.), their realization in an integrated form is still a challenge. In this work, an all-optical integrator based on a silicon photonic phase-shifted Bragg grating is proposed and experimentally demonstrated, which shows a wide operation bandwidth of 750 GHz and integration time window of 9 ps. The integral operation for single pulse, inphase pulses, and π-shifted pulses with different delays has been successfully achieved. | XU WANG FENG ZHOU SIQI YAN YUAN YU JIANJI DONG XINLIANG ZHANG | 2017 | Photonics Research2017，5，3： | 3 |
| 10 | Bionic SERS chip with super-hydrophobic and plasmonic micro/nano dual structure显示文摘Natural surface-enhanced Raman spectroscopy(SERS) chips based on plants or insects have gained increased attention due to their facile characteristics and low costs. However, such chips remain a major challenge for practical application because of poor reproducibility and stability as well as unavoidable damage to the surface structure during coating metal and uncontrolled dehydration. By using a simple wrinkling method, we develop a new route to fabricate a low-cost bionic SERS chip for practical detection. Inspired by the taro leaf, we fabricate a SERS chip with a super-hydrophobic and plasmonic micro/nano dual structure, and its structure parameters can be optimized. Compared with the natural taro-leaf SERS chip, our artificial chip exhibits Raman signals with an order of magnitude higher sensitivity(~10^(-9)M) and enhancement factor(~10~7) under the illumination of weak laser radiation, demonstrating that our SERS chip has great potential in biological detection. The excellent performances of our bionic SERS chip are attributed to a synergy of optimized micro-wrinkle and nano-nest, which is verified by experiment and simulation. We believe our bionic chip could be a promising candidate in practical application due to its merits such as simple fabricating process, optimizable structure, low cost, excellent homogeneity, high sensitivity, and stability. | FENGYOU YANG HAORAN ZHANG HUIMIN FENG JIANJIE DONG CHUANG WANG QIAN LIU | 2018 | Photonics Research2018，6，2： | 3 |
| 11 | Large-range tunable fractional-order differentiator based on cascaded microring resonators显示文摘在这份报纸,我们试验性地证明用电子上串联的在薄片上的一个所有光的连续地悦耳的部分顺序的微分器调节了 microring 共鸣器(MRR ) 。由改变在 MRR 上使用的电压,在 MRR 的回声频率的阶段移动变化,它能被用来实现悦耳的部分顺序的微分器。有一个更大的悦耳的范围的因此部分顺序的微分器能被在一个单个薄片上串联更多的 MRR 单位获得。在实验,我们分别地在二串联 MRR 上使用了二直接当前的电压来源,并且 0.57 ~ 2 的一个悦耳的顺序范围与 Gaussian 脉搏注射被表明了,它是到我们的知识的最大的调节范围。 | Ting YANG Shasha LIAO Li LIU Jianji DONG | 2016 | Frontiers of Optoelectronics2016，9，3： | 2 |
| 12 | A tunable and switchable single-longitudinal-mode dual-wave- length fiber laser incorporating a reconfigurable dual- pass Mach-Zehnder interferometer and its application in microwave generation显示文摘 | Wang Fei Xu Enming Dong Jianji | 2011 | Optics Communications2011，284，9： | 1 |
| 13 | 40 Gb/s all - optical NRZ to RZ format conversion using single SOA assisted by cptical bandpass filter显示文摘 | Jianji Dong Y&diang Zhang Jing Xu and Liu Huang | 2007 | Optics Exprcss2007，15，6： | 1 |
| 14 | All-optical uhraw- ideband monocycle generation utilizing gain saturation of a dark re- turn-to-zero signal in a semiconductor optical amplifier 显示文摘 | DONG Jianji ZHANG Xinliang XU Jing | 2007 | Opt Lett2007，32，15： | 1 |
| 15 | Metasurface for highly-efficient on-chip classical and quantum all-optical modulation显示文摘Metasurface made of artificially two-dimensional structured subwavelength-scaled nanostructures gives rise to unprecedented efficient way to realize on-chip all-optical modulation,in both classical regime and quantum regime. | Siqi yan Jianji Dong | 2022 | Light(Science & Applications)2022，11，9： | 1 |
| 16 | The smallest nanowire spectrometers显示文摘Optical spectroscopy is a versatile characterization technique for a wide range of applications.Developing miniaturized spectrometers is the trend for applications in which small footprint takes precedence over high resolution.However,development of micro-spectrometers based on miniaturized or integrated optics is approaching a bottleneck toward submillimeter scales because of the inherent scale limitation of their optical components or path lengths.Although these constraints can be circumvented with computational spectral reconstruction by addressing a full range of spectral components simultaneously at multiple detectors,complex millimeter-scale arrays of individually prepared filters arranged over charge-coupled device or complementary metal-oxide semiconductor detectors are difficult to be miniaturized. | Jianji DONG | 2019 | Frontiers of Optoelectronics2019，12，4： | 1 |
| 17 | All-optical UWB genera- tion and modulation using SOA-XPM effect and DWDM-based multi-chan- nel frequency discrimination显示文摘 | WANG Fei DONG Jianji XU Enming | 2010 | OPTICS EXPRESS2010，18，24： | 1 |
| 18 | Experimental demonstration of both inverted and non-inverted wavelength conversion based on transient cross phase modulation of SOA显示文摘 | Songnian Fu Jianji Dong P Shum Liren Zhang | 2006 | Optics Express2006，14，17： | 1 |
| 19 | Imaging of virtual ob- jects with a plane periodic grating显示文摘 | Dong Jianjie Zhang Weiping | 2009 | Optics Let- ters2009，34，20： | 1 |
| 20 | Arbitrary-order Band- width-Tunable Temporal Differentiator Using a Programmable Optical Pulse Shaper显示文摘 | DONG Jianji YU Yuan ZHANG Yin | 2011 | IEEE Photonics Journal2011，3，6： | 1 |
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